Thiel is best known for co-founding PayPal. He also co-founded Palantir, a big-data software company that is presently valued at roughly $20 billion, making it the fourth-largest private internet company worldwide.

Thiel was the first outside investor in Facebook and also funded other major tech startups including Spotify, Stripe and SpaceX.

He donated $2.6 million to Ron Paul's super-PAC in 2012 and has given to other libertarian causes over the years. Thiel, who is openly gay, has publicly supported gay marriage and medical marijuana use.

Dennis Revell, former President Reagan’s son-in-law, and California state Senate Minority Leader Jean Fuller (R-Bakersfield) are also on Trump's delegates list.

“We believe that our delegation represents the economic and grassroots community diversity of California,” said Tim Clark, Trump’s California strategist. "We feel very good about it.”